After the Snow iBooks started taking a more conventional form factor, the slim clamshell design has gone the way of the Buffalo. Now that the MacBook Air has surfaced, I notice design similarities between the two. It's almost like the design went full circle. It's not so much Clamshellesque and that oh so sexy handle isn't featured in the MBA. I do see a progression as far as how slim the Clamshell was and how thin the MBA is. You might not see it, but it's just an observation.